<?php
/**
 * Checks the naming of member variables.
 *
 * @author    Greg Sherwood <gsherwood@squiz.net>
 * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
 */

namespace PHP_CodeSniffer\Standards\PEAR\Sniffs\NamingConventions;

use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Sniffs\AbstractVariableSniff;

class ValidVariableNameSniff extends AbstractVariableSniff
{
    /**
     * Processes class member variables.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The file being scanned.
     * @param int                         $stackPtr  The position of the current token
     *                                               in the stack passed in $tokens.
     */
    protected function processMemberVar(File $phpcsFile, $stackPtr)
    {
        $tokens = $phpcsFile->getTokens();

        $memberProps = $phpcsFile->getMemberProperties($stackPtr);
        if (true === empty($memberProps)) {
            return;
        }

        $memberName = ltrim($tokens[$stackPtr]['content'], '$');
        $scope = $memberProps['scope'];
        $scopeSpecified = $memberProps['scope_specified'];

        if ('private' === $memberProps['scope']) {
            $isPublic = false;
        } else {
            $isPublic = true;
        }

        // If it's a private member, it must have an underscore on the front.
        if (false === $isPublic && '_' !== $memberName[0]) {
            $error = 'Private member variable "%s" must be prefixed with an underscore';
            $data = [$memberName];
            $phpcsFile->addError($error, $stackPtr, 'PrivateNoUnderscore', $data);

            return;
        }

        // If it's not a private member, it must not have an underscore on the front.
        if (true === $isPublic && true === $scopeSpecified && '_' === $memberName[0]) {
            $error = '%s member variable "%s" must not be prefixed with an underscore';
            $data = [
                ucfirst($scope),
                $memberName,
            ];
            $phpcsFile->addError($error, $stackPtr, 'PublicUnderscore', $data);

            return;
        }
    }

    //end processMemberVar()

    /**
     * Processes normal variables.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The file where this token was found.
     * @param int                         $stackPtr  The position where the token was found.
     */
    protected function processVariable(File $phpcsFile, $stackPtr)
    {
        // We don't care about normal variables.
    }

    //end processVariable()

    /**
     * Processes variables in double quoted strings.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The file where this token was found.
     * @param int                         $stackPtr  The position where the token was found.
     */
    protected function processVariableInString(File $phpcsFile, $stackPtr)
    {
        // We don't care about normal variables.
    }

    //end processVariableInString()
}//end class
